1 /* $NetBSD: atomic.h,v 1.4 2005/12/28 19:09:29 perry Exp $ */
2
3 /*
4 * Copyright 2002 (c) Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Frank van der Linden for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #ifndef _ATOMIC_H
39 #define _ATOMIC_H
40
41 #ifndef _LOCORE
42
43 static __inline u_int64_t
x86_atomic_testset_u64(volatile u_int64_t * ptr,u_int64_t val)44 x86_atomic_testset_u64(volatile u_int64_t *ptr, u_int64_t val) {
45 __asm volatile ("xchgq %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
46 return val;
47 }
48
49 static __inline u_int32_t
x86_atomic_testset_u32(volatile u_int32_t * ptr,u_int32_t val)50 x86_atomic_testset_u32(volatile u_int32_t *ptr, u_int32_t val) {
51 __asm volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
52 return val;
53 }
54
55
56
57 static __inline int32_t
x86_atomic_testset_i32(volatile int32_t * ptr,int32_t val)58 x86_atomic_testset_i32(volatile int32_t *ptr, int32_t val) {
59 __asm volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
60 return val;
61 }
62
63
64
65 static __inline void
x86_atomic_setbits_u32(volatile u_int32_t * ptr,u_int32_t bits)66 x86_atomic_setbits_u32(volatile u_int32_t *ptr, u_int32_t bits) {
67 __asm volatile("lock ; orl %1,%0" : "=m" (*ptr) : "ir" (bits));
68 }
69
70 static __inline void
x86_atomic_clearbits_u32(volatile u_int32_t * ptr,u_int32_t bits)71 x86_atomic_clearbits_u32(volatile u_int32_t *ptr, u_int32_t bits) {
72 __asm volatile("lock ; andl %1,%0" : "=m" (*ptr) : "ir" (~bits));
73 }
74
75
76
77 static __inline void
x86_atomic_setbits_u64(volatile u_int64_t * ptr,u_int64_t bits)78 x86_atomic_setbits_u64(volatile u_int64_t *ptr, u_int64_t bits) {
79 __asm volatile("lock ; orq %1,%0" : "=m" (*ptr) : "ir" (~bits));
80 }
81
82 static __inline void
x86_atomic_clearbits_u64(volatile u_int64_t * ptr,u_int64_t bits)83 x86_atomic_clearbits_u64(volatile u_int64_t *ptr, u_int64_t bits) {
84 __asm volatile("lock ; andq %1,%0" : "=m" (*ptr) : "ir" (~bits));
85 }
86
87 #define x86_atomic_testset_ul x86_atomic_testset_u32
88 #define x86_atomic_testset_i x86_atomic_testset_i32
89 #define x86_atomic_setbits_l x86_atomic_setbits_u32
90 #define x86_atomic_setbits_ul x86_atomic_setbits_u32
91 #define x86_atomic_clearbits_l x86_atomic_clearbits_u32
92 #define x86_atomic_clearbits_ul x86_atomic_clearbits_u32
93
94 #endif
95 #endif
96